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Environmental fate & pathways

Henry's Law constant

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Description of key information

The calculated Henry’s Law Constant (25°C) is in the range from 2.93 to 42.1 Pa m³/mol (EPISUITE, HENRYWIN v3.20).

Key value for chemical safety assessment

Additional information

The Henry’s Law Constant (at 25 °C), calculated for monomeric constituents with HENRYWIN programme v3.20 (EPISUITE), using both bond and group contribution method, is in the range from 2.93 to 42.1 Pa m³/mol. The calculated result for a potential dimeric constituent is much lower (7.14E-4 Pa m³/mol). This value can, however, be used only as a qualitative indication, since the molecular weight is above the range of the training set. Only the bond method can be applied in this case, as not all parameters required for the group contribution method are available. As the content of oligomers should be maintained as small as possible, it can be assumed that this contribution is negligible. On the basis of the values calculated for monomers, a slow volatilisation of the substance from the water phase is expected.